tests: add test case to cover varchar default value (#2799)#2893

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ti-chi-bot merged 3 commits intopingcap:release-5.0from ti-chi-bot:cherry-pick-2799-to-release-5.0

Sep 27, 2021

+74-4

Commits on Sep 25, 2021

tests: add test case to cover varchar default value

amyangfei
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amyangfei
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ti-chi-bot
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Commits on Sep 27, 2021

Merge branch 'release-5.0' into cherry-pick-2799-to-release-5.0
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